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Evolved High Speed Packet Access, HSPA+, HSPA (Plus) or HSPAP, is a technical standard for wireless broadband telecommunication, and extends the original HSPA. The 3GPP standard organisation specified the original HSPA in release 7. HSPA+ can achieve data rates of up to 42.2 Mbit/s.[1] HSPA+ upgrades existing 3G networks to achieve speeds closer to 4G without a new radio interface. HSPA+ should not be confused with LTE, which uses an air interface based on orthogonal frequency-division modulation and multiple access.[2]
HSPA+ introduces antenna array technologies such as beamforming and multiple-input multiple-output communications (MIMO). Beamforming focuses antenna power in a beam toward the user's direction. MIMO uses multiple antennas on the sending and receiving side. Further releases of the standard have introduced dual carrier operation, allowing communication over two 5 MHz frequency bands simultaneously.
Advanced HSPA+ is a further evolution of HSPA and provides download speeds up to 168 Mbit/s and upload speeds up to 22 Mbit/s. This is achieved with higher order modulation (64QAM) or combining cells with Dual-Cell HSDPA.
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